Major Lady finger plant diseases are given below:-
1.Cercospora Leaf Spots:Cercospora malayensis, C. abelmoschi
- In India, two species of Cercospora produce leaf spots in bhindi.
- C. Malayensis causes brown, irregular spots and C.abelmoschi causes sooty black, angular spots.
- Both the leaf spots cause severe defoliation and are common during humid seasons.
- Spraying Mancozeb 0.25 % control the disease.
2.Fusarium wilt: Fusarium oxysporum f.sp. vasinfectum
- The conspicuous symptom is a typical wilt, beginning with a yellowing and stunting of the plant, followed by wilting and rolling of the leaves as if the roots were unable to supply sufficient water.
- Finally, the plant dies.
- If a diseased stem is split lengthwise, the vascular bundles appear as dark streaks.
- When severely infected, nearly the whole stem is blackened.
- Treat the seeds with Mancozeb @ 3g/kg seed.
- Drench the field with Copper oxy chloride @ 0.25%.
3.Powdery mildew: Erysiphe cichoracearum
- Powdery mildew is very severe on bhindi.
- Greyish powdery growth occurs on the under as well as on the upper surface of the leaf causing a severe reduction in fruit yield.
- Spray inorganic sulphur 0.25% or Dinocap 0.1% 3 or 4 times at 15 days interval.
4.Vein-Clearing/Yellow Vein Mosaic: Bhendi yellow vein mosaic virus
- Yellowing of the entire network of veins in the leaf blade is the characteristic symptom.
- In severe infections the younger leaves turn yellow, become reduced in size and the plant is highly stunted.
- The veins of the leaves will be cleared by the virus and interveinal area becomes completely yellow or white.
- In a field, most of the plants may be diseased and the infection may start at any stage of plant growth.
- Infection restricts flowering and fruits, if formed, may be smaller and harder.
- The affected plants produce fruits with yellow or white colour and they are not fit for marketing.
- The virus is spread by whitefly.
- By selecting varieties resistant to yellow vein mosaic like Parbhani Kranti, Arka Abhay, Arka Anamika, and Varsha Uphar, the incidence of the disease can be minimised.
- The virus is transmitted by the whitefly (Bemisia tabaci,.
- Parbhani Kranti, Janardhan, Haritha, Arka Anamika and Arka Abhay can tolerate yellow vein mosaic.
- For sowing during the summer season, when the whitefly activity is high, the susceptible varieties should be avoided.
- Spraying monocrotophos 1.5 ml/litre of water can restrict the disease spread.
- Synthetic pyrethroids should not be used because it will aggravate the situation.
- It can be controlled by application of Chlorpyriphos 2.5 ml + neem oil 2 ml lit of water.
- TamilNadu Agritech Portal